Does this predict how many losses in a row I'll actually have?

No. You choose the length of the hypothetical losing streak yourself. This is a stress test comparing two sizing behaviors under the same scenario, not a prediction of future market outcomes.

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What happens to my account if I double my position size after every loss?

Q: What happens to my account if I double my position size after every loss?

Set your account size, normal risk per trade, a hypothetical number of consecutive losses, and a size multiplier such as 2 for doubling. The simulator compares flat, disciplined sizing against sizing that multiplies after each loss, and shows the loss number where the doubling path wipes out the account, if it does.

The traders who last aren't the ones who never lose. They're the ones who never guess.

Jason Parker, Founder of Trading Habits

Set Up the Scenario

Your Result

Fill in your scenario and click Run Simulation to compare disciplined sizing against doubling down.

How this is calculated

The disciplined path risks the same percentage of its current balance on every loss. The doubling path multiplies its risk percentage by your chosen multiplier after every single loss, which is the actual definition of a martingale sizing approach.
Once the doubling path's risk percentage would reach or exceed 100% of the account, that trade is marked as wiping out the account, since there is no capital left to risk on the next one. This tends to happen within a handful of losses even starting from a small risk percentage, because the multiplier compounds every single loss.
This is a hypothetical stress test using a losing streak length you choose. It does not predict how many losses in a row you will actually take, and it does not account for broker margin calls, which would typically stop an actual martingale sequence even earlier than this model does.
Doubling down after a loss does not improve your odds on the next trade. Each trade's outcome is treated as independent here, exactly as it would be in live trading. Only the sizing gets more dangerous, not more accurate.

Risk & liability disclaimer: This tool models a hypothetical scenario using the numbers you enter. It is not a prediction of future market outcomes and does not guarantee any trading result. Trading involves risk of loss, and margin-based or size-escalating strategies can lose more than your initial deposit. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. Always verify results independently and consult a licensed professional before making any trading or financial decision.

What happens to my account if I double my position size after every loss?

Set Up the Scenario

Your Result

How this is calculated

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